Track-sander.



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l. DENNIS.

TRACK SANDER.

APPLICATION man MAR.4.1915.

1 ,1 60,147. Patented Nov. 16, 1915.

2 SHEETS-SHEET 2.

CDLUMBIA PLANOGRAPH can/ASUNCION. D. c.

rANNr Ien.

JOSEPH DENNIs, oF RoANoKE, VIRGINIA, AssIGNon oF ONE-HALF To JAMES Yn.

. UQUHAR'I, or ROANOKE, VIRGINIA.

TRACK-SANDER.

,Specication of Letters Patent.

Patented Nov. 16, 1915.

To all whom t may concern.'

Be it known that I, JOSEPH DENNIS, a'

invention, such asw-ill enableothers skilled in the art to which it appertains'to make and use the same.

My invention relates to improvements in track sanding devices and more particularly Y to those used on locomotives, such devices usually7 including a sand dome disposed upon the boiler, whereby the sand is maintained in a/very drystate, for facilitating its deliverv from the dome to the rails.l

Heretofore, numerous devices have been provided for discharging the `sand -from the dome, and most of these devices employ complicated systems of valves and levers. Need-less to sav, complete simplicitylin a device of this character', is therefore a'great advantage. It is to attain such simple meansy for discharging the sand from the dome, that I have provided the novel construction hereinafter described and claimed.

In describing the invention, I shall .refer to the accompanying drawings wherein like reference characters designate corresponding parts throughout the various figures and wherein:

Figure 1 is a horizontal section of a sand dome provided with delivery means, constructed in accordance with the invention; and Fig. 2 is a section cut diametrically through the dome, this view being taken upon the plane indicated by the line 2 2 of Fig. l.

In these drawings, constituting a part of the application, 1 designates a common type of sand dome which is provided with a solid bottom 2 from which an annular flange 3 depends, said flange being shaped to fit the shell of the boiler B as indicated in Fig. 2.

Depending from the bottom 2, at diametrically spaced points. is a pair of sand delivery chutes 4 into the upper ends of which these openings 5 discharge. Anchored within these openings 5 and rising therefrom into the dome 1, are the long arms 6 of a pair of inverted U-tubes 7, the short arms 8 of which are provided on their lower ends with Venturi tubes 9, the latter opening downwardly and being spaced above additional openings 10 which are spaced inwardly from the openings 5.

'.Disposed between the boiler Band the bottom 2, is a pipe 1l to which compressed air is fed-by a supply pipeA 12 leading to one outlet of a vmultiple port valve 13, pressure being delivered to said valve by a main air supply pipe14 which'may lead to any,

appropriate source of iiuid pressure. Connected to and rising from the opposite ends j o'f'the pipe l1 through the openings l0, is a` pair of upright blow pipes 15 having centrally perforated caps 16 on their' upper ends.

from the dome or tank and deliver it into spection of the drawings.

It will be understood that any appro- 'the'chutes 4 as will be obvious by an iny tracks or to individual sanding pipes, and

` that in order to facilitate the passage of the sand through such a system of pipes, it is expedient to provide means subordinate to the U-tubes 7. For this purpose, I have provided a pair of upright blow pipes 17 leading through bosses 18 into the upper sides of the chutes 4, said pipes 17 being connected to the opposite ends of a U- shaped pipe 19 to which compressed air is supplied by a pipe 2O leading from one of the outlets of the valve 13.

Bv the construction above described, the multiple port valve 13 may be so actuated as to first admit compressed air only into the pipes 20, 19 and 17. thus effectively cleaning the chutes 4 and pipes leading therefrom of anv sand which might have lodged therein; Manipulation of the valve to another position, will now not only allow corn.- pressed air to be forcedy through the aforesaid Dipes. but through the pipes 12 and ll, thereby7 delivering sand through the U-tubes 7 to the chutes 4, in which chutes the sand is acted upon by the blasts of air directed downwardlv from the blow pipes 17, wherebv it is effectively blown upon the track.

Itis to be observed that considerable space prevails between the bottom 2 and the boiler B andthat the compressed air pipe 11 and a portion of the pipe 12, are disposed with- These caps are so disposed beneath the Venturi'tubes 9 as to causev air forced intor said tubes by said pipes, to draw sand in this space. v p from the boiler accumulates within the flange Sbeneath the bottom 2, thus not onl37 effectively drying the sand inthe dome, but` heating the compressed air as it is dis,- charged through the pipes 12 and V11. By so doing, more expansive power and more force is imparted to said air, thus allowing the sand to be more readily discharged. lj; will be understood, however, that the moment. the supply of air is eheeked, no. more sand willy be discharged from the tank.

AIt is te be noted, that by the construction and arrangement of parte above described, no parte are disposer-l within the, dome or tank l, with the. exception of the tubes 7 and the elements` adjacentl thereto. This is very important, Snee. it is, undoubtedly ad? vantageene. t0 have the greater perton et: the tank free from internal obetrueti,onse

From the foregoing description, taken in connection with the aeeernuanvns drawings it Will be evident that, although very v Simple construction has been. provided for carrying out the. Object. of: they invention', the,

complete device will be very effloeni, in op? eration and will possess a number ofadi vantageous features. 1

I. claim;

1,., The combination with Sand dome. f

having a pair of openings in itsbettem, et

CQnes. er this netent may be. attained fer This is essential'since heat an inverted U-tube in the tank, and having a long arm anchored in one of the openings, and a short arm disposed above the other opening, a 1Venturi tube carried bv the lower E an upright blow pipe rising through the ,i

bottom thereof and terminating adjacent said bottom, a downwardly opening Venturi tube disposed over said pipe, and a delivery tube leading `from said Venturi tube to. the, exterior `of the dome.

3. The combination. with `a sand dome adapted to be supported above a locomotive boiler, of a blow pipe rising through the bottom of said tank, a fluid pressure sup P15 pipe, disposed beneathV said bottom and delivering into Said blow pipe; a Venturi tubel disposed within the bottom, at, a point above said blew pipe, and a delivery tube leading from the Venturi tube to the eXterioret the tank testimony Whereof l have, hereunto ,seta

my in presence ot twe'snbeerbng witnesses, Y

JOSEPH DENNIS. Witnesses: l

J: )3l-CretaY (l Genen,- Y

ve tents Cath, by addressing the flsnxiulissienerefv relents Washington, De Q," i 

